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- PDB-3l4v: Crystal complex of N-terminal Human Maltase-Glucoamylase with kot... -

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Basic information

Entry
Database: PDB / ID: 3l4v
TitleCrystal complex of N-terminal Human Maltase-Glucoamylase with kotalanol
ComponentsMaltase-glucoamylase, intestinal
KeywordsHYDROLASE / Glycoside Hydrolase Family 31 / Cell membrane / Disulfide bond / Glycoprotein / Glycosidase / Membrane / Multifunctional enzyme / Polymorphism / Signal-anchor / Sulfation / Transmembrane
Function / homology
Function and homology information


amylase activity / dextrin catabolic process / maltose catabolic process / oligo-1,6-glucosidase activity / glucan 1,4-alpha-glucosidase activity / alpha-1,4-glucosidase activity / alpha-glucosidase / starch catabolic process / Digestion of dietary carbohydrate / tertiary granule membrane ...amylase activity / dextrin catabolic process / maltose catabolic process / oligo-1,6-glucosidase activity / glucan 1,4-alpha-glucosidase activity / alpha-1,4-glucosidase activity / alpha-glucosidase / starch catabolic process / Digestion of dietary carbohydrate / tertiary granule membrane / catalytic activity / ficolin-1-rich granule membrane / carbohydrate binding / apical plasma membrane / Neutrophil degranulation / extracellular exosome / plasma membrane
Similarity search - Function
: / Spasmolytic Protein, domain 1 / Spasmolytic Protein; domain 1 / P-type trefoil, conserved site / P-type 'Trefoil' domain signature. / Trefoil (P-type) domain / P-type trefoil domain / P-type trefoil domain superfamily / P-type 'Trefoil' domain profile. / P or trefoil or TFF domain ...: / Spasmolytic Protein, domain 1 / Spasmolytic Protein; domain 1 / P-type trefoil, conserved site / P-type 'Trefoil' domain signature. / Trefoil (P-type) domain / P-type trefoil domain / P-type trefoil domain superfamily / P-type 'Trefoil' domain profile. / P or trefoil or TFF domain / Glycosyl hydrolases family 31, conserved site / Glycosyl hydrolases family 31 signature 2. / Glycosyl hydrolases family 31, active site / Glycosyl hydrolases family 31 active site. / glycosyl hydrolase (family 31) / Glycoside hydrolase family 31, N-terminal domain / Glycosyl hydrolase 31 N-terminal galactose mutarotase-like domain / : / Glycosyl hydrolase family 31 C-terminal domain / Glycoside hydrolase family 31 / Glycosyl hydrolases family 31 TIM-barrel domain / Galactose mutarotase-like domain superfamily / Golgi alpha-mannosidase II / Glycosyl hydrolase, all-beta / Few Secondary Structures / Irregular / Glycosidases / Glycoside hydrolase superfamily / TIM Barrel / Alpha-Beta Barrel / Immunoglobulin-like / Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
Chem-KTL / Maltase-glucoamylase
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.1 Å
AuthorsSim, L. / Rose, D.R.
CitationJournal: Biochemistry / Year: 2010
Title: New glucosidase inhibitors from an ayurvedic herbal treatment for type 2 diabetes: structures and inhibition of human intestinal maltase-glucoamylase with compounds from Salacia reticulata.
Authors: Sim, L. / Jayakanthan, K. / Mohan, S. / Nasi, R. / Johnston, B.D. / Pinto, B.M. / Rose, D.R.
History
DepositionDec 21, 2009Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 9, 2010Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Nov 1, 2017Group: Refinement description / Category: software
Item: _software.classification / _software.contact_author ..._software.classification / _software.contact_author / _software.contact_author_email / _software.date / _software.language / _software.location / _software.name / _software.type / _software.version
Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Database references / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / database_PDB_caveat / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_validate_chiral / struct_asym / struct_conn / struct_ref_seq_dif / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _chem_comp.type / _pdbx_entity_nonpoly.entity_id / _pdbx_entity_nonpoly.name / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_validate_chiral.auth_asym_id / _pdbx_validate_chiral.auth_seq_id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_ref_seq_dif.details
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Nov 27, 2024Group: Data collection / Database references / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_entry_details / pdbx_modification_feature
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Maltase-glucoamylase, intestinal
hetero molecules


Theoretical massNumber of molelcules
Total (without water)100,7715
Polymers99,2771
Non-polymers1,4944
Water12,178676
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)91.278, 109.693, 110.075
Angle α, β, γ (deg.)90.000, 90.000, 90.000
Int Tables number19
Space group name H-MP212121

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Components

#1: Protein Maltase-glucoamylase, intestinal / Maltase / Alpha-glucosidase / Glucoamylase / Glucan 1 / 4-alpha-glucosidase


Mass: 99276.742 Da / Num. of mol.: 1 / Fragment: UNP residues 87-954
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: MGA, MGAM, MGAML / Plasmid: pMT-BiP-V5-His / Production host: Drosophila melanogaster (fruit fly) / Strain (production host): S2 cells
References: UniProt: O43451, alpha-glucosidase, glucan 1,4-alpha-glucosidase
#2: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][a-D-GlcpNAc]{}}}LINUCSPDB-CARE
#3: Chemical ChemComp-KTL / (1S,2R,3R,4S)-1-{(1S)-2-[(2R,3S,4S)-3,4-dihydroxy-2-(hydroxymethyl)tetrahydrothiophenium-1-yl]-1-hydroxyethyl}-2,3,4,5-tetrahydroxypentyl sulfate


Mass: 424.442 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C12H24O12S2
#4: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 676 / Source method: isolated from a natural source / Formula: H2O
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.78 Å3/Da / Density % sol: 55.68 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 6.5
Details: 20% PEG 3350, 0.2M sodium sulfate, pH 6.5, vapor diffusion, hanging drop, temperature 293K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: CHESS / Beamline: F1 / Wavelength: 0.9175 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Apr 19, 2009
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9175 Å / Relative weight: 1
ReflectionResolution: 2.1→20 Å / Num. obs: 65399 / % possible obs: 99.9 % / Redundancy: 7.3 % / Rmerge(I) obs: 0.122 / Net I/σ(I): 9.2
Reflection shell
Resolution (Å)Redundancy (%)Rmerge(I) obs% possible all
2.1-2.147.40.515100
2.14-2.177.40.448100
2.17-2.227.40.425100
2.22-2.267.40.324100
2.26-2.317.40.381100
2.31-2.367.40.329100
2.36-2.427.40.283100
2.42-2.497.40.249100
2.49-2.567.40.233100
2.56-2.647.40.206100
2.64-2.747.40.179100
2.74-2.857.40.158100
2.85-2.987.40.136100
2.98-3.137.40.119100
3.13-3.337.40.101100
3.33-3.597.40.091100
3.59-3.947.30.081100
3.94-4.517.30.07599.8
4.51-5.667.20.07399.9
5.66-206.60.09198.7

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Processing

Software
NameVersionClassificationNB
DENZOdata reduction
SCALEPACKdata scaling
REFMAC5.2.0019refinement
PDB_EXTRACT3.005data extraction
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 2.1→19.81 Å / Cor.coef. Fo:Fc: 0.954 / Cor.coef. Fo:Fc free: 0.926 / Occupancy max: 1 / Occupancy min: 0.5 / SU B: 4.654 / SU ML: 0.122 / Cross valid method: THROUGHOUT / ESU R: 0.198 / ESU R Free: 0.177 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.2316 3266 5.1 %RANDOM
Rwork0.18209 ---
obs0.18456 61109 99 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 26.477 Å2
Baniso -1Baniso -2Baniso -3
1-0 Å20 Å20 Å2
2--0 Å20 Å2
3---0 Å2
Refinement stepCycle: LAST / Resolution: 2.1→19.81 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6986 0 96 676 7758
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0150.0227300
X-RAY DIFFRACTIONr_bond_other_d
X-RAY DIFFRACTIONr_angle_refined_deg1.5831.9499983
X-RAY DIFFRACTIONr_angle_other_deg
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.7745885
X-RAY DIFFRACTIONr_dihedral_angle_2_deg36.67824.424373
X-RAY DIFFRACTIONr_dihedral_angle_3_deg14.762151115
X-RAY DIFFRACTIONr_dihedral_angle_4_deg14.5521539
X-RAY DIFFRACTIONr_chiral_restr0.1160.21079
X-RAY DIFFRACTIONr_gen_planes_refined0.0060.025720
X-RAY DIFFRACTIONr_gen_planes_other
X-RAY DIFFRACTIONr_nbd_refined0.2060.23349
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined0.3120.24901
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.1610.2688
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined0.2820.250
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined0.230.212
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it0.9151.54472
X-RAY DIFFRACTIONr_mcbond_other
X-RAY DIFFRACTIONr_mcangle_it1.51627058
X-RAY DIFFRACTIONr_scbond_it2.41833292
X-RAY DIFFRACTIONr_scangle_it3.6934.52915
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 2.1→2.154 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.303 240 -
Rwork0.231 4398 -
obs--98.74 %

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